438 Dr. E. Stizenberger on the Sasicolar Species of Opegrapha. 
trachyticis, raro in radicibus vel rhizomatibus, Germanie, Hel- 
vetiee, Hungarie, Fennie. 
Oés. Thallus valde variabilis at nil typici in hisce formis inest. 
Forme apotheciis radiato-ramosis ad varietatem subsiderellam, Nyl. 
Scand. accedunt. 
3. Opegrapha zonata, Korb. Syst. et Pg. 
O. tristis, Fw. p.p. Exs. Korb. 18; Arn. 183; Rbh. 517. 
Thallus tenuis, fuscus, albo-soreumaticus, lineis atris decussato-limi- 
tatus (seepe Chroolepo conspurcatus). Apothecia aggregata, 
sessilia, rotundata vel ovalia (0°5 millim. longa, 0:3-0°4 millim. 
lata), nigra; epithecio rotundato vel elliptico, concavo, margine 
prominente rotundato, ztate attenuato. Hymenium in hypothecio 
fusco, dilute fuscescens (80 mik. altum), e paraphysibus ramosis 
intricatis et ascis clavatis (70 mik. longis, 16 mik. latis) compo- 
situm. Sporee 82”, fusiformes, graciles, rectze vel curvulz, hya- 
linee, raro infuscatse, 5—11-septatee (25-37 mik. longee, 4-6 mik. 
crassee). Hymenium presertim protoplasma ascorum tinctura 
iodii pulchre vinose rubescens. Spermogonia minute punctiformia. 
Spermatia tenella, cylindrica, recta (6 mik. longa, 0°5 mik. lata), 
in sterigmatibus brevisetiformibus. 
In regione montana Silesiz, Franconiz, Badeniz, Longobardiz ad 
rupes varias. 
4. Opegrapha varia, Pers. (notha Ach.) saxicola. 
O. varieformis, Anzi, Comm. Soc. Critt. It. p. 160 (ut videtur). 
f. pulicaris (Hffm.) saxicola. 
Syn. ut forme sequentis. 
Thallus tenuis, farinaceus vel leprosus vel nullus (interdum Chroolepo 
conspurcatus). Apothecia sparsa, sessilia, elliptica vel lanceolata, 
apicibus obtusis, simplicia, raro tridentata, recta (0°5-1 millim. 
longa, 0°2-0°5 millim. lata), nigra; epithecio pliciformi, ztate de- 
hiscente, interdum viridi-suffuso, margine persistenter prominente. 
Hymenium (60 mik. altum) hyalinum, superne olivaceum e para- 
physibus conglutinatis et ascis clavatis (50-55 mik. longis, 16-18 
mik. latis) compositum. Sporz 8"®, subfusiformes vel clavate, 
5-septatee, eetate fuscee (20-23 mik. longe, 6-7 mik. crassz). 
Hymenium tinctura iodii vinose rubescens. Spermogonia puncti- 
formia, nigra. Spermatia cylindrica, recta (5 mik. longa, 1 mik. 
crassa), in sterigmatibus setiformibus (ca. 15 mik. longis). 
Obs. Maximam partem sub forma sequente adhuc latet. Eam e 
Franconia (in rupibus dolomiticis prope ‘‘Gailenreuther Hohle,”’ 
necnon ad Casendorf et ad rupes arenaceas montis Hohenlandsberg. 
Hbb. Rehm et Arnold), necnon e Badenia (ad rupes arenaceas prope 
Heidelberg, in Hb. Zw.) vidi. 
f. diaphora, Ach. saxicola. 
O. varie, ff. Fries, Nyl. O.tridens 8. arenaria, Ach. O. argtllicola, Duby. 
